How can I fix CarPlay call quality and freezing issues after the latest iOS update?

Since update prior to 18.4 calls on CarPlay sound like they are dropping or there is a poor connection, "can you hear me now?". Also, CarPlay seems confused when attempting to hangup. It lags and screen freezes. All other audio from iPhone via CarPlay work flawlessly. When connected to vehicle via only bluetooth calls work fine. I've tried different cables and switching bluetooth off on iPhone with no success.